Writing Equivalent Expressions and Evaluating Expressions

Which of the following is equivalent to $9^3$  ?

• 27

• 81

• 729

Which of the following expressions is equivalent to  $\frac{1}{x^6}$  ?

•  $x^{-6}$  

•  $\frac{1}{x^{-6}}$  

•  $\frac{x^6}{1}$  

Evaluate

 $\frac{x+y}{2}+\frac{3y}{2}$  when  $x=2$  and  $y=4$  

Evaluate $m+n\left(5+n^2\right)$  , when  $m=15\$  and  $n=3$  .

Which operation would you do first? $\left(12+10\right)\div10\cdot14-6$  

• Division

• Multiplication

• Addition

• Subtraction

What would you solve first?

 $3\cdot48\div\left(15-3\right)$  

•  $3\cdot48$  
  

•  $48\div15$  
  

•  $15-3$  
  

•  $48\div12$  
  

What step would you do second ? 

 $\left(4-2\right)\cdot9+7$  

• multiplication

• subtraction

• addition

• dividing

Find and explain the error.    
 5 - 3 + 2
     5 - 5
        0

• There is no error.
• Addition was done first and you should have subtracted first
• There is a subtraction error

Tags

CCSS.4.NBT.B.4

Simplify  $\left[6\left(x+4\right)-12\right]-\left[5\left(x-8\right)+11\right]$  

Simplify $7a-\left[9-3\left(5a-2\right)\right]$